RU2056449C1 - Ceramic luster dye - Google Patents

Abstract

FIELD: decoration of porcelain and faience articles. SUBSTANCE: proposed dye contains (mass %): bismuth resinate 3.2-4.4, titanium resinate 4.1-4.7, ferrum stearate 38.0-41.0, nitrobenzene 10.7-12.5, castor oil 11.5-12.9, chloroform 4.9-7.1, colophony 2.5-3.1 and turpentine. Mixing of the solutions is carried out. EFFECT: improves quality of desired dye. 3 tbl

Description

 The invention relates to compositions of ceramic chandelier paints, in particular to overglaze paints that give an iridescent, rainbow effect after firing, and are intended for decorating porcelain and faience products by the method of transferring paint from a stamp.

Known, for example, ceramic chandelier paint, comprising the following components, wt. Iron benzostearate 13.0-16.0 Boron-isoamyl ether 2.5-3.5 Tetraline 5.0-7.0 Chloroform 5.0-7.0 Rosin 23.0-28.0 Turpentine Else
The well-known ceramic chandelier paint creates a golden yellow color after firing on porcelain products. This ceramic luster paint is used to apply lines (ribbons, stripes) to porcelain products.

 However, this paint is not suitable for transferring from a die to the surface of porcelain glaze, since a clear outline of the paint line is not maintained at the time of transfer of the paint and during firing. In addition, the color of the known paint is shifted to the yellow region of the spectrum.

Known ceramic chandelier paint, comprising the following components, wt. [1] Iron rubber 50-70 Bismuth rubber 4-6 Titanium rubber 6-20 Lavender oil 1-2 Turpentine oil 12-17 Benzene 1-10
The well-known ceramic luster paint after firing on the glass creates an orange color. However, due to the fact that the known paint contains a significant amount of low-boiling natural essential oils and benzene, it has a high spreadability on the glass and is not suitable for transfer from the stamp to the product. In addition, the color of the known paint is shifted to the red region of the spectrum.

Closest to the technical nature of the claimed is a ceramic chandelier paint containing resinates of bismuth and titanium, iron stearate, rosin, plasticizing oil, nitrobenzene, chloroform and turpentine [2]
However, due to the fact that the known ink contains a significant amount of volatile chloroform, which lowers viscosity, it has high flowability and is not suitable for transfer from the stamp to the product, i.e., for direct printing. In addition, the color of the known paint is shifted to the green region of the spectrum.

 The objective of the invention is the creation of ceramic chandelier paint, suitable for direct printing on products and having a yellow-orange color.

This is achieved by the fact that a ceramic chandelier paint containing bismuth and titanium resinates, iron stearate, rosin, a plasticizing oil, nitrobenzene, chloroform and turpentine contains castor oil as a plasticizing oil in the following ratio of components, wt. Bismuth rubber 3.2-4.4 Titanium rubber 4.1-4.7 Iron stearate 38.0-41.0 Nitrobenzene 10.7-12.5 Castor oil 11.5-12.9 Chloroform 4.9-7 , 1 Rosin 2.5-3.1 Turpentine Else
Moreover, pine rosin is used in the examples.

 The color of ceramic luster paint is carried out in the yellow-orange region of the spectrum and has a difference of 7 units. CIELAB with the color of the prototype paint, which also satisfies the conditions of the task of the invention.

Finished ceramic chandelier paint is applied to non-porous ceramic products by stamp. Drying time 30-50 minutes under normal conditions. The firing temperature is usual for luster inks 780-830 ^C (depending on product), and held at maximum temperature for 5-10 min.

For the preparation of the proposed ceramic luster ink which is a mixture of iron stearate, resinates bismuth and titanium, a number of conventional organic solvents, castor oil and rosin resinate each separately is prepared by the following procedure: into the molten rosin at 170-190 ^{° C} in small portions introduced a corresponding amount salt of one of these metals, based on the dry residue of the formulation, the temperature was raised to 15-20 ^{° C} and heated until the reaction. A mixture of solvents, for example turpentine with nitrobenzene, is introduced into the prepared resinate and left to cool and stand for 24 hours. After this, it is filtered through a sieve with 10,000 holes / cm ² , settled and decanted.

Iron stearate was prepared by precipitation from a solution of sodium soap iron sulfate at a temperature of ≈ 40 ° ^C. After purification stearate iron from the mother solution thereof dissolved in a mixture of nitrobenzene, chloroform and turpentine. To obtain ceramic luster paint, these resinate solutions are mixed with a solution of iron stearate, a solution of rosin in turpentine and castor oil in a selected ratio.

 The invention is illustrated by specific examples 1-5 and table 1.

Obviously, the criterion for the possibility of transferring ink from the stamp to the glaze and during the annealing of the paint on these substrates without spreading the line contour is the value of the contact angle θ between the surface of the ink solution and the stamp material (rubber in the proposed case) and glaze θ ₂ . Should be satisfied almost completely wet paint stamp material with θ ₁ ≈ 2-5 ^o and incomplete wetting, 0 <θ ₂ ^<90 °, glazes and glass.

Good wetting of the stamp material is necessary to create a continuous, without tearing, coating of the stamp pattern with paint, while the transfer of ink to the glaze should be carried out with incomplete wetting of these materials, far from the spreading conditions, with the establishment of an equilibrium value of θ ₂ so that the contours of the lines remained clear at room and elevated temperatures.

 The composition of the ceramic chandelier paint was selected so that the angle θ, measured by the projection of a lying drop, was optimal on a die rubber substrate and on porcelain and earthenware glaze to maintain the sharpness of the line contour of 5-7% of its size. The measurement results are given in table.2.

Practical immutability θ ₂ at elevated temperatures, examples 2 and 5 are explained, apparently, by the rapid evaporation of organic solvents and a significant increase in the viscosity of the paint solution.

 Ceramic chandelier paint with the compositions according to examples 1-3 (table 1) according to the measurement results maintains the sharpness of the contour line in ± 4-6% of its size when transferring paint from a rubber stamp to the glaze and during the firing process, which satisfies the purpose of the invention and transfer criteria.

 The coloristic characteristics of ceramic chandelier paint according to examples 1-3 (table 1) after firing are shown in table 3.

, рассчитанное из данных табл.3 между составами по примерам 1-3 (табл.1), в среднем равно 0,4 ед. CIELAB, что делает их визуально неразличимыми. В связи с тем, что эта величина мала, рассчитали Δ Е между цветом состава краски по примеру 2 и цветом краски-прототипа (ПР): Δ Е_2-ПР 6,5 ед CIELAB, что удовлетворяет условию задачи изобретения.Color Difference E

calculated from the data of table 3 between the compositions of examples 1-3 (table 1), on average, equal to 0.4 units CIELAB, which makes them visually indistinguishable. Due to the fact that this value is small, Δ E was calculated between the color of the paint composition of Example 2 and the color of the prototype paint (PR): Δ E _2-PR 6.5 units of CIELAB, which satisfies the conditions of the invention.

.Gloss of ceramic chandelier paint is defined as the ratio of reflection coefficients with a mirror component R ₃ to the reflection coefficient without a mirror component, R _δ with a dominant wavelength λ _D according to the formula Bλ _D

.

For ceramic chandelier paint B _λD 1.3 for the prototype paint B _λD 1.1, which should be recognized as an advantage of the proposed chandelier paint.

 The color of the proposed chandelier paint has a dominant wavelength of 582-583 nm, which corresponds to the yellow-orange region of the spectrum (MCO color chart, 1931).

 The purity P and color saturation S of the proposed luster paint satisfy the decor. The color tone H is approximately the same for the paint compositions in examples 1-3 (table 1).

 Thus, ceramic chandelier paint maintains the sharpness of the line contour of ± 4-6% of its size when transferring paint from a rubber stamp to porcelain and earthenware glazes, i.e. non-porous ceramics, and in the process of firing paint, which satisfies the conditions of the task of the invention.

 The color of ceramic luster paint is carried out in the yellow-orange region of the spectrum and has a difference of 6.5 units. CIELAB with the color of the prototype paint, which also satisfies the conditions of the task of the invention.

 The color characteristics of ceramic luster paint are stable and reproducible.

 The technology for preparing the proposed paint does not differ from the traditional one.

Claims (1)

CERAMIC CHANDELIER PAINT containing bismuth and titanium resinates, iron stearate, rosin, plasticizing oil, nitrobenzene, chloroform and turpentine, characterized in that it contains castor oil as plasticizing oil in the following ratio, wt.%:
Bismuth rubber - 3.2 - 4.4
Titanium Rubber - 4.1 - 4.7
Iron Stearate - 38.0 - 41.0
Rosin - 2.5 - 3.1
Castor oil - 11.5 - 12.9
Nitrobenzene - 10.7 - 12.5
Chloroform - 4.9 - 7.1
Turpentine - Else

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